本标准的范围是针对蒸汽容量为200000 lbs/hr（25 kg/s）或更大的锅炉的机组/电厂需求开发子系统。该子系统包括发电需求、锅炉需求开发、汽轮机需求开发、节流阀/集管压力控制和单位兆瓦/蒸汽流量控制（如适用）。本标准将涉及两种类型的工艺应用:a）一台锅炉为一台涡轮机供电，这是典型的电力设施发电厂；andb）一台或多台锅炉提供一个共同的分配集管，典型的工业发电厂。具体排除在考虑范围之外的是:a）调度控制；b） 涡轮机/发电机控制（涡轮机需求除外）；c） 给水控制（SD）蒸汽温度控制（ANSI/ISA-77.44.01《火力发电厂-蒸汽温度控制》单独涵盖）；e） 燃烧控制（ANSI/ISA-77.41.01《火力发电厂锅炉燃烧控制》单独涵盖）； f） 蒸汽分配控制系统；g） 锅炉的经济负荷；和h）流化床锅炉。目的本文件旨在制定火力发电厂锅炉控制系统的机组/电厂需求开发功能设计规范的最低要求。

The scope of this standard is to address the unit/plant demand development subsystem for boilers with steaming capacities of 200,000 lbs/hr (25 kg/s) or greater. This subsystem includes generation demand, boiler demand development, turbine demand development, throttle/header pressure control, and unit megawatt/steam flow control as applicable.This standard will address two types of process applications:a) a single boiler supplying a single turbine, typical of an electric utility power plant; andb) a single boiler or multiple boilers supplying a common distribution header, typical of an industrial power plant.Specifically excluded from consideration are:a) dispatch control;b) turbine/generator control (other than turbine demand);c) feedwater controlsd) steam temperature controls (covered separately by ANSI/ISA-77.44.01, Fossil Fuel Power Plant - Steam Temperature Controls);e) combustion controls (covered separately by ANSI/ISA-77.41.01, Fossil Fuel Power Plant Boiler Combustion Controls);f) steam distribution control systems;g) economic loading of boilers; andh) fluidized bed boilers.PurposeThe purpose of this document is to establish the minimum requirements for the functional design specifications of unit/plant demand development for control systems for fossil-fueled power plant boilers.